GHG Summary Report

CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):3,471,269.9
CO2 equivalent emissions from supplier subparts LL-QQ (metric tons):
Biogenic CO2 emissions from facility subparts C-II, SS, and TT (metric tons):0
Cogeneration Unit Emissions Indicator:N
GHG Report Start Date:2020-01-01
GHG Report End Date:2020-12-31
Description of Changes to Calculation Methodology:
Plant Code Indicator:N
Primary NAICS Code:331110
Second Primary NAICS Code:

Parent Company Details:

Parent Company Name:US STEEL CORP
Address:600 Grant Street, Pittsburgh, PA 15219-2800
Percent Ownership Interest:100

Subpart C: General Stationary Fuel Combustion

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	3,131,652 (Metric Tons)
Own Result?

Gas Name	Biogenic Carbon dioxide
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Methane
Gas Quantity	3.73 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	1.655 (Metric Tons)
Own Result?

Unit Details:

Unit Name : CP-ET-NG1
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428
Cumulative Maximum Rated Heat Input Capacity: 3873

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 95422.5 (metric tons)

Tier Fuel Details:

Fuel : Natural Gas (Weighted U.S. Average)
Tier Name : Tier 2 (Equation C-2a)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31
Frequency of HHV determinations : Other (specify)
Other specified frequency of HHV determinations : 2 months (April and August 2020)

Tier 2 Monthly HHV Details :

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
95422.5 (Metric Tons)	1.80 (Metric Tons)	0.180 (Metric Tons)	45.0 (Metric Tons)	53.6 (Metric Tons)

Unit Name : ET-B3
Unit Type : OB (Boiler, other)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428 (mmBtu/hr)

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)

Tier Fuel Details:

Fuel : Blast Furnace Gas
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
620284.5 (Metric Tons)	0.05 (Metric Tons)	0.248 (Metric Tons)	1.4 (Metric Tons)	73.9 (Metric Tons)

Carbon Content Substitute Data Information :
Total number of valid carbon content determinations : 12
Total number of carbon content substitute data values : 0
Frequency of carbon content determinations : Monthly
Total number of operating hours in the reporting year for which missing data substitution was used for fuel usage : 0

Molecular Weight Information :
Total number of valid molecular weight determinations : 12
Total number of molecular weight substitute data values : 0
Frequency of molecular weight determinations : Monthly
Molar Volume Constant (MVC) used : 849.5 (scf/kg-mole)

Unit Name : ET-B1
Unit Type : OB (Boiler, other)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428 (mmBtu/hr)

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)

Tier Fuel Details:

Fuel : Blast Furnace Gas
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
660169.2 (Metric Tons)	0.06 (Metric Tons)	0.263 (Metric Tons)	1.4 (Metric Tons)	78.5 (Metric Tons)

Unit Name : CP-ET-COG1
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428
Cumulative Maximum Rated Heat Input Capacity: 1712

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 90195 (metric tons)

Tier Fuel Details:

Fuel : Coke Oven Gas
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
90195.0 (Metric Tons)	1.12 (Metric Tons)	0.233 (Metric Tons)	28 (Metric Tons)	69.5 (Metric Tons)

Unit Name : ET-B2
Unit Type : OB (Boiler, other)
Unit Description :

Individual Unit Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428 (mmBtu/hr)

Emission Details:
Annual CO₂ mass emissions from sorbent: 0 (Metric Tons)
Annual Biogenic CO2 Emissions: 0 (metric tons)

Tier Fuel Details:

Fuel : Blast Furnace Gas
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
669870.6 (Metric Tons)	0.06 (Metric Tons)	0.268 (Metric Tons)	1.5 (Metric Tons)	79.8 (Metric Tons)

Unit Name : CP-ET-BFG2
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 247.5
Cumulative Maximum Rated Heat Input Capacity: 742.5

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 451020.4 (metric tons)

Tier Fuel Details:

Fuel : Blast Furnace Gas
Tier Name : Tier 2 (Equation C-2a)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31
Frequency of HHV determinations : Monthly

Tier 2 Monthly HHV Details :

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
451020.3 (Metric Tons)	0.04 (Metric Tons)	0.164 (Metric Tons)	0.9 (Metric Tons)	49.0 (Metric Tons)

Unit Name : CP-ET-BFG1
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 247.5
Cumulative Maximum Rated Heat Input Capacity: 742.5

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 496957.9 (metric tons)

Tier Fuel Details:

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
496957.7 (Metric Tons)	0.04 (Metric Tons)	0.181 (Metric Tons)	1.0 (Metric Tons)	54.0 (Metric Tons)

Unit Name : CP-ET-COG4
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 5
Cumulative Maximum Rated Heat Input Capacity:

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 5587.3 (metric tons)

Tier Fuel Details:

Fuel : Coke Oven Gas
Tier Name : Tier 2 (Equation C-2a)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31
Frequency of HHV determinations : Monthly

Tier 2 Monthly HHV Details :

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
5587.3 (Metric Tons)	0.06 (Metric Tons)	0.012 (Metric Tons)	1.4 (Metric Tons)	3.6 (Metric Tons)

Unit Name : CP-ET-COG2
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 135
Cumulative Maximum Rated Heat Input Capacity: 540

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 274.4 (metric tons)

Tier Fuel Details:

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
274.4 (Metric Tons)	0.00 (Metric Tons)	0.001 (Metric Tons)	0.1 (Metric Tons)	0.2 (Metric Tons)

Unit Name : CP-ET-COG3
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 135
Cumulative Maximum Rated Heat Input Capacity: 540

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 3081.8 (metric tons)

Tier Fuel Details:

January	February	March	April	May	June	July	August	September	October	November	December
N	N	N	N	N	N	N	N	N	N	N	N

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
3081.8 (Metric Tons)	0.03 (Metric Tons)	0.007 (Metric Tons)	0.8 (Metric Tons)	2 (Metric Tons)

Unit Name : CP-ET-COG5
Unit Type : OCS (Other combustion source)
Unit Description :
Other Unit Name :

Common Pipe Details:
Use Ivt Indicator: Y
Maximum Rated Heat Input Capacity: 428
Cumulative Maximum Rated Heat Input Capacity: 1712

Emission Details:
Annual Biogenic CO2 Emissions: 0 (metric tons)
Annual Fossil fuel based CO2 Emissions: 38788.7 (metric tons)

Tier Fuel Details:

Fuel : Coke Oven Gas
Tier Name : Tier 3 (Equation C-5, gaseous fuel)
Tier Methodology Start Date : 2020-01-01
Tier Methodology End Date : 2020-12-31

Fuel Emission Details :

Total CO2 emissions	Total CH4 emissions	Total N2O emissions	Total CH4 emissions CO2e	Total N2O emissions CO2e
38788.7 (Metric Tons)	0.47 (Metric Tons)	0.098 (Metric Tons)	11.8 (Metric Tons)	29.2 (Metric Tons)

Subpart Q: Iron and Steel Production

CEMS Monitoring Location (CML) Details

Gas Information Details

Gas Name	Carbon Dioxide
Gas Quantity	339,030.3 (Metric Tons)
Own Result?

Gas Name	Biogenic Carbon dioxide
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Methane
Gas Quantity	0 (Metric Tons)
Own Result?

Gas Name	Nitrous Oxide
Gas Quantity	0.004 (Metric Tons)
Own Result?

The values below are total values for units where the CO₂ emissions were calculated using the mass balance methodology
Annual mass of fuel consumed: ()
Average carbon content of fuels: ()
Annual mass of non-fuels consumed: ()
Average carbon content of non-fuels: ()
Annual mass of products and byproducts produced: ()
Average carbon content of byproducts: ()

No Cems Unit Details:

Unit Name: ETBOP2
Unit Description:
Unit Type: Basic Oxygen Process Furnace

CO2Emissions: 163890.2 (Metric Tons)

Inputs/Outputs:

Name	Type	Classification	# of Times Carbon Content Substituted	Carbon Content Basis	Other Carbon Content Basis	Annual Quantity Substituted Data Method
			0	ASTM D5373-08
			0	Supplier
			0	Supplier
			0	ASTM D5373-08
			0	ASTM C25-06
			0	Supplier
			0	ASTM E1915-07a
			0	ASTM E1915-07a
			0	ASTM D5373-08
			0	ASTM E1915-07a
			0	ASTM E1915-07a

Unit Name: ETVD
Unit Description:
Unit Type: Decarburization Vessel

CO2Emissions: 497.4 (Metric Tons)

Inputs/Outputs:

Name	Type	Classification	# of Times Carbon Content Substituted	Carbon Content Basis	Other Carbon Content Basis	Annual Quantity Substituted Data Method
			0	ASTM D5373-08

Unit Name: ET-BFGFLARE
Unit Description:
Unit Type: Flare

Type of flare: Unassisted
Flare service type: Unit flare
Emissions Details

CO2 Emissions Calculation Method: 98.253(b)(1)(iii) - Equation Y-3 Start-up, Shutdown, Malfunction

Name	Value	Own Result?
CO2Emissions	9707.4 (Metric Tons)	Y

Name	Value	Own Result?
CH4Emissions	0.00 (Metric Tons)	Y

Name	Value	Own Result?
N2OEmissions	0.004 (Metric Tons)	Y

Total number of start-up, shutdown, or malfunction (SSM) events exceeding 500,000 scf/day: 0

Unit Name: ETBOP1
Unit Description:
Unit Type: Basic Oxygen Process Furnace

CO2Emissions: 164935.3 (Metric Tons)

Inputs/Outputs:

Name	Type	Classification	# of Times Carbon Content Substituted	Carbon Content Basis	Other Carbon Content Basis	Annual Quantity Substituted Data Method
			0	ASTM E1019-08
			0	Supplier
			0	Supplier
			0	ASTM E1019-08
			0	Supplier
			0	ASTM C25-06
			0	ASTM E1915-07a
			0	ASTM E1019-08
			0	ASTM E1915-07a
			0	ASTM E1915-07a
			0	ASTM E1915-07a

Flares